Nitrogen is crucial for plant growth, as it's a major component of chlorophyll, where photosynthesis occurs. It's also a part of amino acids, the building blocks of proteins. The 7% nitrogen content helps in promoting vigorous leaf and stem growth, especially useful in the early stages of plant development or when green, leafy growth is desired.

Potassium is vital for plant health, involved in the activation of many growth-related enzymes, and plays a significant role in water regulation within the plant cells. A 7% potassium content helps in improving the plant’s drought resistance, disease resistance, and overall hardiness. It is also important for the development of strong roots and helps in the synthesis of plant sugars, which affects the taste and quality of fruits and vegetables.

The absence of phosphorus in this formulation makes it particularly suitable for soils that already have adequate or high levels of phosphorus. Over-application of phosphorus can lead to environmental issues, such as water eutrophication. Therefore, using a 7-0-7 fertilizer helps avoid contributing to these problems in phosphorus-rich soils.